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About Audio Cables
The connections between the ADAT HD24 and your
studio are your music's lifeline, so use only high
quality cables. These should be low-capacitance
shielded cables with a stranded (not solid) internal
conductor and a low-resistance shield. Although
quality cables cost more, they do make a difference.
Route cables to the HD24 correctly by
observing the following precautions:
•
Do not bundle audio cables with AC power
cords.
•
Avoid running audio cables near sources of
electromagnetic
transformers, monitors, computers, etc.
•
Do not place cables where they can be stepped
on.
Stepping on a cable may not cause
immediate damage, but it can compress the
insulation between the center conductor and
shield (degrading performance) or reduce the
cable's reliability.
•
Avoid twisting the cable or having it make
sharp, right angle turns.
•
Never unplug a cable by pulling on the wire
itself. Always unplug by firmly grasping the
body of the plug and pulling directly outward.
And most importantly, keep connectors
clean. Every few months, unplug them and
wipe off oxidation with a clean cloth soaked in
alcohol or contact cleaner. Insert the plugs in
the jacks a few times, to clean the internal jack
contacts. Although Alesis does not endorse
any specific product, certain chemicals, when
applied to electrical connectors, are claimed to
improve the electrical contact between
connectors. Avoid oily products that actually
attract more dirt.
The ADAT HD24 is wired according to the modern
standard of "Pin 2 (tip) = Hot". Some older
equipment was wired with Pin 3 hot; check to
make sure correct polarity is maintained
throughout your system.
ADAT HD24 Reference Manual
interference
such
Typical input jack hookups
The inputs of a multitrack recorder are typically
hooked up in one of three ways:
From the console's "direct outs"
•
(sometimes
This patches one channel of the mixer directly
to one track of the recorder, bypassing most
mixer circuitry. This is preferred when the
signals going to tape require none of the mixer's
features (effects, grouping, routing, etc.).
From the mixer's "bus" or "group"
•
outputs. You can use the mixer for grouping,
premixing, effects, etc. This puts more circuitry
between the sources and the HD24, although
as
since most routing can be done at the mixer,
you'll seldom need to do any repatching.
From
•
outputs
situations require a combination of the two
approaches, especially if you're recording a lot
of tracks at once and your mixer has only 8
group outputs:
Example:
Here's a typical arrangement that might be used on
a live tracking session, cutting basics for a full band
plus two "guide vocals":
Mic
Kick
Snare
Snare bottom
Hi-hat
Tom 1
Tom 2
Tom 3
Tom 4
Overhead left
Overhead right
Bass
Guitar
Piano
Digital synth
Analog synth
Vocal 1
Vocal 2
chapter 2 • connections
labeled
"tape
a
combination
and
bus
outputs.
Mixer out
Track
Direct out
1
"
2
"
3
"
4
Group 1-2
5-6 (pan left)
"
5-6 (left-center)
"
5-6 (right-center)
"
5-6 (pan right)
Direct out
7
Direct out
8
"
9
"
10
Group 3-4
11-12 (stereo)
"
"
"
"
Direct out
13
"
14
outs".
of
direct
Some
23
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